利用 WR-1轮轨滚动磨损实验机研究不同轴重下轮轨材料滚动磨损与损伤性能。结果表明：轮轨试样磨损率均随轴重增加呈现线性增加趋势，且钢轨试样磨损率大于车轮试样磨损率。轮轨试样硬化率均随时间呈现先增加后趋于稳定的变化趋势，轮轨试样塑变层厚度和硬化率均随轴重增加而增大，且车轮试样硬化率大于钢轨。车轮试样和钢轨试样表面损伤形貌不同，车轮试样表面表现为垂直于滚动方向的疲劳裂纹，钢轨试样表面表现为裂纹和块状剥落，轮轨试样表面损伤均随轴重增加而更加严重；车轮试样表面裂纹疲劳断裂和钢轨试样表面块状剥落形成磨屑，成分主要为Fe2 O3和马氏体，随轴重增加，磨屑尺寸呈现增大趋势，但成分与含量无明显变化。
The rolling wear and damage characteristics of wheel and rail materials under different axle-loads were investigated using a WR-1 wheel/rail rolling wear testing apparatus.The results show that both of the wear rates of wheel and rail materials rise linearly with the increase of axle-load,and the wear rate of rail specimen is larger than wheel.The hardening rates of wheel and rail specimens firstly increase obviously and then keep stable along with the test time.With the increase of axle-load,the depth of plastic deformation layer and the hardness rate of wheel and rail specimens increase.The hardness rate of wheel is larger than rail.The surface damage morphology of wheel specimen is differ-ent from rail.For the surface damage morphology of wheel specimen consists of fatigue cracks perpen-dicular to rolling direction,however,the rail surface damage morphology is dominated by cracks and spalls.The surface damage of the wheel and rail specimens gets increasingly severe along with the in crease of axle-load.Debris,which comes from fatigue cracks fracture of wheel specimen and spalling of rail,is composed of Fe2 O3 and martensite.With the increase of axle-load,the size of debris increa-ses,the components and their content,however,have no obvious change.
参考文献
| [1] | CORREA N;OYARZABAL O;VADILLO E G et al.Rail corru-gation development in high speed lines[J].WEAR,2011,271:2438-2447. |
| [2] | DIRKS B;ENBIOM R .Prediction model for wheel profile wear and rolling contact fatigue[J].WEAR,2011,271:210-217. |
| [3] | REN L;XIE G;IWNICKI S D .Properties of wheel/rail longitudi-nal creep force due to sinusoidal short pitch corrugation on railway rails[J].WEAR,2012,284-285:73-81. |
| [4] | 温泽峰,金学松,刘兴奇.两种型面轮轨滚动接触蠕滑率和摩擦功[J].摩擦学学报,2001(04):288-292. |
| [5] | WANG W J;ZHONG W;LIU Q Y et al.Investigation on rolling wear and fatigue properties of railway rail[J].Proceedings of the Institution of Mechanical Engineers Part J:Journal of Engineer-ing Tribology,2009,223(07):1033-1039. |
| [6] | 邓建辉,刘启跃,王飞龙,吴雄先.车速对钢轨接触疲劳伤损的影响及高速线路钢轨选用[J].钢铁钒钛,2006(03):48-54. |
| [7] | 王步康,董光能,刘永红,谢友柏.钢轨短波长波浪形磨损的安定性分析[J].摩擦学学报,2004(01):70-73. |
| [8] | DONZELLA G;FACCOLI M;GHIDINI A et al.The competitive role of wear and RCF in a rail steel[J].Engineering Fracture Me-chanics,2005,72:287-308. |
| [9] | 郭俊,赵鑫,金学松,刘启跃.全制动工况下轮轨热-机耦合效应的分析[J].摩擦学学报,2006(05):489-493. |
| [10] | 丁昊昊,付志凯,郭火明,周琰,王文健,刘启跃.三种钢轨材料与车轮匹配时滚动磨损与损伤行为[J].摩擦学学报,2014(03):233-239. |
| [11] | 宋川,刘建华,彭金方,张林,周琰,朱旻昊.接触应力对车轴钢旋转弯曲微动疲劳寿命的影响[J].材料工程,2014(02):34-38. |
| [12] | Stuart Grassie;Paul Nilsson;Kjell Bjurstrom;Anders Frick;Lars Goran Hansson .Alleviation of rolling contact fatigue on Sweden's heavy haul railway[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2002(1/2):42-53. |
| [13] | CLAYTON P .Predicting the wear of rails on curves from labora-tory data[J].WEAR,1995,181 -183:11-19. |
| [14] | 王文健,郭俊,刘启跃.接触应力对轮轨材料滚动摩擦磨损性能影响[J].摩擦学学报,2011(04):352-356. |
| [15] | 钟雯 .钢轨的损伤机理研究[D].西南交通大学,2011. |
| [16] | 谭晓明,张丹峰,陈跃良,金平.基于疲劳裂纹萌生机理的铝合金疲劳寿命可靠性评估方法[J].航空材料学报,2014(02):84-89. |
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